This may be related to the SDL library / Wii libraries supplied with the nightly build.

If this is still occurring with the v1.6.0 release, then can you try earlier releases i.e. v1.5.0, v1.4.0, v1.3.0, v1.2.1 etc back to 0.12.0 if possible. Try to find when this problem was introduced or whether this has always been this way...